Selina Wang reports from the White House, the White House went into lockdown after multiple shots were heard nearby; Jaclyn Lee reports from Orange County, California, 50,000 residents are under evacuation orders as officials battle to contain an unstable chemical tank; Alex Presha reports from Washington, DC, President Trump says an agreement with Iran will be announced “shortly” that would reopen the Strait of Hormuz and more on tonight’s broadcast of World News Tonight with David Muir. 00:00